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| 渭河宝鸡峡全新世特大洪水水文学研究 | |
| 引用本文： | 万红莲,黄春长,庞奖励,查小春.渭河宝鸡峡全新世特大洪水水文学研究[J].第四纪研究,2010,30(2):430-440. |
| 作者姓名： | 万红莲 黄春长 庞奖励 查小春 |
| 作者单位： | 1. 陕西师范大学旅游与环境学院,西安,710062;宝鸡文理学院灾害监测与机理模拟陕西省重点实验室,宝鸡,721013 2. 陕西师范大学旅游与环境学院,西安,710062;中国科学院黄土与第四纪地质国家重点实验室,西安,710075 3. 陕西师范大学旅游与环境学院,西安,710062 |
| 基金项目： | 国家自然科学基金项目，中国科学院黄土与第四纪地质国家重点实验室基金项目，陕西省教育厅自然科学研究计划项目 |
| 摘 要： | 通过深入的考察，在渭河宝鸡峡河段发现典型的全新世古洪水滞流沉积地层剖面，并进行了古洪水沉积学和水文学研究。对于采集的序列样品，进行粒度成分、磁化率、烧失量、CaCO3含量等分析，从沉积学角度证明了剖面上覆盖在古土壤S0顶部的沉积物为典型的古洪水滞流沉积层。根据其地层结构及其与流域内其他剖面的对比，结合其所含古文化层考古学年代和OSL断代数据等，确定渭河上游在3200～3000aB.P.发生了3次特大洪水事件。利用古水文学原理恢复其水位，并且利用水位-流量关系模型，计算出古洪水洪峰流量为22560～25960m3/s。 这个结果大大延长了洪水水文数据序列，从而能够建立渭河万年尺度洪水流量-频率关系，对于防洪减灾、水能源和水资源开发具有重要的应用价值。该成果揭示出万年尺度大暴雨洪水与气候变化的关系，丰富了全球变化的区域响应理论。 |
| 关 键 词： | 渭河 宝鸡峡 古洪水 全新世 |
HOLOCENE EXTREME FLOODS OF THE BAOJI GORGES OF THE WEIHE RIVER |
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| Wan Honglian,Huang Chunchang,Pang Jiangli,Zha Xiaochun.HOLOCENE EXTREME FLOODS OF THE BAOJI GORGES OF THE WEIHE RIVER[J].Quaternary Sciences,2010,30(2):430-440. | |
| Authors: | Wan Honglian Huang Chunchang Pang Jiangli Zha Xiaochun |
| Institution: | College of Tourism and Environment Sciences|Shaanxi Normal University|Xi′an710062； State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, Xi′an710075； The Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province|Baoji University of Arts and Sciences|Shaanxi|Baoji721013 |
| Abstract: | Palaeo-hydrology is a newly developed field in the last twenty years. The Weihe River is a major tributary in the middle reach of the Yellow River,which is well-known in the world because of its great hydrological variation,heavy sediment load and flood disasters in history. This paper did a palaeo-hydrological investigation in the Baojixia Gorges of the upper reach of the Weihe River. Except routine field work,the methods used are mainly to analyze grain size,magnetic susceptibility,CaCO_3 content and luminescence dating(OSL)for samples collected from the WH-GCZ profile. There were three extreme flood events to be recognized in this profile. They occurred in 3200～3000aB.P.of Holocene. By calculating on the basis of a water level-discharge model,the peak discharges of these three floods were between 22560m~3/s and 25960m~3/s. These results will provide references for establishing a 10000-year scale peak flood discharge-flood frequency relationship of the Weihe River. |
| Keywords: | Weihe River Baojixia Gorges palaeoflood Holocene |
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